Red: 110°F to 120°F - Danger: heat cramps, and heat exhaustion are likely; heat stroke is probable with continued activity

Pink: 120°F or higher - Extreme danger: heat stroke is imminent

This is critical information for anyone participating in summer-time activities: sports, camping, hiking, etc. Even keeping tabs on elderly friends and family members, especially at risk from heat-related illnesses.

The Heat Index layers can be found under the Surface Weather category in the Layer Browser.